Mat



FIG. 1 is a perspective view of the mat showing my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a front side view thereof; and,

FIG. 4 is a bottom plan view thereof, oriented such that the "lower right-hand corner " of the mat shown in FIG. 1 corresponds to the "upper right-hand corner" of the mat shown in FIG. 4.

The left side view of the mat is identical to the right side view of the mat, the back view is identical to the front view, and the bottom plan view is identical to the top plan view. 

The ornamental design for a mat, as shown and described. 